[Intel-gfx] [PATCH] drm/i915: Report all failed registers for ctx isolation

[Mika Kuoppala]

For CI it is enough to point out a single failure
in isolation. However it is beneficial to gather
info in logs for transients further down
the line.

Do not stop into first comparison failure but
continue probing forward.

v2: for all engines and poisons (Chris)

Cc: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gt/selftest_lrc.c | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c
index d3e163c93e22..d5b170adff1c 100644
--- a/drivers/gpu/drm/i915/gt/selftest_lrc.c
+++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c
@@ -5170,7 +5170,6 @@ static int compare_isolation(struct intel_engine_cs *engine,
 					       A[0][x], B[0][x], B[1][x],
 					       poison, lrc[dw + 1]);
 					err = -EINVAL;
-					break;
 				}
 			}
 			dw += 2;
@@ -5309,6 +5308,7 @@ static int live_lrc_isolation(void *arg)
 		0xffffffff,
 		0xffff0000,
 	};
+	int err = 0;
 
 	/*
 	 * Our goal is try and verify that per-context state cannot be
@@ -5319,7 +5319,6 @@ static int live_lrc_isolation(void *arg)
 	 */
 
 	for_each_engine(engine, gt, id) {
-		int err = 0;
 		int i;
 
 		/* Just don't even ask */
@@ -5330,23 +5329,25 @@ static int live_lrc_isolation(void *arg)
 		intel_engine_pm_get(engine);
 		if (engine->pinned_default_state) {
 			for (i = 0; i < ARRAY_SIZE(poison); i++) {
-				err = __lrc_isolation(engine, poison[i]);
-				if (err)
-					break;
+				int result;
 
-				err = __lrc_isolation(engine, ~poison[i]);
-				if (err)
-					break;
+				result = __lrc_isolation(engine, poison[i]);
+				if (result && !err)
+					err = result;
+
+				result = __lrc_isolation(engine, ~poison[i]);
+				if (result && !err)
+					err = result;
 			}
 		}
 		intel_engine_pm_put(engine);
-		if (igt_flush_test(gt->i915))
+		if (igt_flush_test(gt->i915)) {
 			err = -EIO;
-		if (err)
-			return err;
+			break;
+		}
 	}
 
-	return 0;
+	return err;
 }
 
 static void garbage_reset(struct intel_engine_cs *engine,
-- 
2.17.1